What other bits of the "Pennsylvania Monarchist" picture do you know about? I can think of:
1) Joseph Bonaparte's house at 16 Washington Square, Philadelphia.
2) French Azilum along the Susquehanna River, near Towanda -- home to monarchist refugees from the French revolution.
3) Madame Iturbide's house on South Broad Street, Philadelphia, and grave at St. John the Evangelist, Philadelphia.